Hot-air furnace or heater



Oct. 30, 1923. 1,472,706

F. WEINECK HOT AIR FURNACE OR HEATER Filed July 5, 1922 s Sheets-Sheet 1 v [-131 fury/ 1m;

.BY/aiS Annmar- Oct. 30 1923.

F. WEINECK HOT AIR FURNACE 0R HEATER 3 Sheets-Sheet 2 FiledJ uly 5, 1922 arms 4710mm: Jwm, @Mw

Oct. 30, 1923. 1,472,706

' F. WEINECK HOT AIR FURNACE OR HEATER Filed July 5. 1922 5 Sheets-Sheet 5 5115mm GU31 q 8 JJYVEJVOR; (7M I/n's ATTORNEY;

Patented Get. 36, 1923.

nnrrso STATES c 1,4223% PATEN T LQVEFEQE; I

;ERED WEINECK, OF ST. PAUL, MINNESOTA.

HOT-A13 rummcnos HEA ER;

Application filed July 5, 1922'. Serial No. 572,919.

My invention relates to hot air furnaces and heaters and the main object is to so construct a device ofsaid kind that it will save fuel by transmitting the greatest pos sible amountor" the heat produced from the fuel intothe -'roo1nor' rooms heated by hot To this end ny apparatus is constructedwrth' an extraordinary/large surface 3 air.

for transmitting heat tothe air used for heating, and with other facilities'for secur ing the maximum ofheatfr'r'om the fuel used.

In the accompanying" drawings:

Fig.1 is a front elevati on of my heater in the simple form adapted for use as-a heat ing stove in one or more rooms=located on the same floor.

Fig. 2 is a partly sectional side elevation of the heater'with thering 7 intact shoW- ing how it may be'used 'as'a hot air furnace for heating, byvhot air, rooms located mainly or only on one floor.

Fig. 3Lis a partly sectional top view of Fig. 1- or the corresponding portion of Flg 2. p

i Fig. 4 is a'section on line 1 l in Fig. 2 p p ward passage of'air'to be'heated in the with many parts omitted.

Fig. 5 is asection on line 55 in Fig. 2

with some parts omitted.

Referring to the drawings by reference numerals it willbe understood that lnasmuch 'as' onesideof the apparatus s a counterpart of the other side aclear illustrationanddescripti'on of'one side will an-v swer "for, both. c 7 l I Whenthe-apparams is used directly in a house or dwelling place it"is proyi-ded with a base supporting ring; 7 hating integral legs 8 andthe base 9 of'the'apparatus rests in a preferably circular recess 'f'o'rined hy arim '9 of said supporting ring. But when the apparatus-is used in the basement as a furnace the ring 7 is omitted the base 9" placed directly on the. floor 10, in a manner not shown but readily 'understoodand a cy-;

-li1idrical top piece 11 of suitableheight leadsthe hot airtromthe top 12 of'the heater to a registerl3 in the floor 14: of the building and after the'airhasheated the room orrooms above said floor 14 it returns downward as indicated by arrows 16 in Fig.

' 2,: through aregister l5 and pipe 17 intoa horseshoe-shaped space 18 between the similarly-shaped Wall l9otthe ashpit 20 and the regular airja'clret 21, taking with it moreor less' fresh air from a tube'22 having avalve28 wlth handle 24cfor' regulating.

the intake'of fresh air from outside the wall 2M0]? the building;

A draft pipe 25 conveysthe smoke into a chimney 26 0f the building. 12 is an orna- 3 mental top ring on the apparatus.

All these air leading pipes and'partsso tar described belng of but common construc-- tion I'have mentioned them at this time so asnot to confuse them with the more "novel features of my device which. will now be describeds This much may however also be -sa1dhere, that wheneyer'the device is used as a-heater in the rooms tobeheated the pipes 11, 17, 22' andregisters 18 and 15 are omitted andthe'hot air flows into the room from a register'lifl in the top of the heater by radial arms 29against the innersideof the sheet-1netallio air 'jacket 21, and is formed with large apertures 30 for the up out lid 35 (see Fig.2). The top plate 36 of said air chamber has a large centralopening downinto the edge 37 of Which is recessed the firep'otBS (seeFig; 2) The projecti'ng'top and bottom ofthe air chain-her are both form d with air passages 39 -directly above each a otherbetween the air chani'berand the'ash chamber; and the botto1n'31' also has air passagesetOoutside the chamber it beingwi'der than the'topaplate 36 above it;

The'top of'the jacket 21" is*secured' at 4:1 I

tofthe'top ring 12' andthe vertical front edges" of the jacket are suitably" secured in place close to the front"p1ate-' or door frame AC2 which is secured by screws (or bolts) 1 43 to} the structure already; partly described, and is provided with several door openings, closed by hinged'doors 44, .45, 46, 47, the latter door carrying two smaller doors 48, 49.

The doors 44 and 46 are each provided with a rocker arm 50, pivotally connected to an operating rod '51 having an enlarged portion 52 with a transverse slot 53 in it. In said slot engages alateral pin 54 of a lever 55 which is pivoted'at 56 to a lug 57 on the door frame 42, so that by raising the outer end of the lever the two doors are opened simultaneously to admit air for purposespresently to be described. when said lever is to be operated by a thermostat a single guided chain 58 attached to the thermostat motor will raise the lever and when the motor acts again to close the doors the gravity of the doors, the lever and the rod 51 will cause the closing.

Turning now to a further description of the heater proper, the stationary grate 59 below the firepot is circular and provided with radial projections 60 which by a slight turning movement of the grate are caused to engage upon inclined top surfaces of fixed lugs 61 and thus to hold the gate in a detachable manner when it is to be repaired or replaced by a new one; The ash pit being. of equal width all the way from its middle to the front end said upper grate may be removed and replaced by opening the large door 47. Likewise the lower grate bars 62 and their supporting ring 63 (see Fig. 5) may be removed, since the ring 36 rests between guiding lugs 64 projecting but slightly upward from segmental-cleats 65 having lugs 66 secured by bolts 67 to the sides of the ash chamber. The ring 63 is provided at its front edge with a short rocker arm 68, upon which may be placed a socket wrench 69, swingable from side to side in shaking the grate bars 62; said grate bars 62 being journaled at 70 in the ring and connected by meshing gears may also be rocked or partly rotated in unison by placing the socket wrench 69 on either one of the square shanks 72 of the front journals of the'g'rates and using the portion 69 of the wrench as a rocking arm.

Mounted upon the top edge of the firepot is a ring forming a practically circular air duct 73 (see Figs. 2 and 4) having a down wardly flared inlet 74 facing the door 46 the inner top edge of said air ductis provided with notches 75 through which air enters (as arrows 76) into the top of the space 77 close above the fire.

Secured by bolts 78 upon the duct 73 is a combustion chamber 79 having a domeshaped top 80 with a central aperture 81 in which is held theflared top end 82 of a downwardly tapered tube 83, to the lower end of which is detachably secured by L-shaped; notches 84 and pins 85 (see Fig.

2) a hollow acorn-shaped air distributor 86 having lateral apertures 87 through which air passes (as arrows 88 in Fig. 4) while the air indicated by arrows 89 comes in the opposite direction whereby air is thoroughly mixed with the gas rising from the burning fuel in the fire pot; the fire also receiving air up through the grates 59 and 62 in the usual manner. The air passing downward through the tube 83 enters the apparatus through a duct'90 leading from the door 44.

The thus heated air and smoke in the combustion chamber 79 may reach the chimney 26 either in a comparatively direct way as indicated by arrows 91 in Fig. 2, the smoke passing to pipe 25 through a horizontal extension 92 of the combustion chamher, or this extension may be closed by raising a valve 93 upward against a stop 94, said valve having a rocker arm 95 operated by a guided rod 96 having a handle 97 at the front of the apparatus. When the valve is thus raised from the horizontal to the vertical position shown, the hot air and smoke pass out at both sides of the combustion chamber into two side chambers 98 and thence downward, as arrows 99, through tubes 100 into the air duct 33 and thence upward, as arrows 101, through a tube 102 into the extension 92 and pipe 25 back of the raised valve 93.

The operation of the apparatus being already described at the beginning of the specification and incidentally in the body of the same, I need here only add further that the air entering the apparatus either through the apertures 8 or through the pipes 17 and 22 is most thoroughly heated by the large heating surfaces of the ash pit, the fire pot, the tubes 100 and chambers 98, combustion chamber 79 and its dome 80, duct and tube 102 before it escapes from the jacket 21 upward through register 13 into the room where the apparatus stands, or through register 13 into rooms above the floor 14, and by such thorough utilizing of the heat a considerable amount, approximately as much as fifty percent, of the fuel used. in. ordinary heating devices is saved.

By proper regulation of the air inlet doors 44 46, draft doors 48 and 49, and. attending to the fire through the fuel intake door 45 according to the kind of fuel used, all gas from the fuel and also the coke of it will be most economically burned and all heat therefrom utilized for heating the room or rooms in the building.

also has toothed segmental catches for holding them partly open as indicated by the element 58 in Figs. 1 and 2, but as such regulating devices are well known I will not fully describeor show them.

In starting a fire in this heating appara: tus the damper or valve 93 should be pushed to horizontal position, the door 49 opened to let air into the base of the fuel, and the doors 4st and 46 should also be opened to let air into the gas in the combustion chamber above the fire pot. The doors and valve 93 may further be regulated later on according to the fuel used and the condition of the fire and the requirement of heat.

\Vhat I claim is:

1. In a device of the class described, the combination with a fire-pot and fuel grates below the same, of a gas mixing and combustion chamber over the fire-pot and means for leading air into the combustion chamber from all sides of it, and means for spreading air outward into the combustion chamber from the center of it, said combustion chamber having a horizontal rearward extension adapted to connect wit-ha chimney or like outlet and having in its lower side an aperture and a vertical flue connected therewith, and a valve arranged to close alternately the top of the flue and the pas sage through the horizontal extension, at horizontally curvedflue embracing the greater portion of the part of the apparatus in which the fuel grates are disposed and having its rear portion communicating with said vertical flue, and a vertical flue at each side of and slightly spaced from the fire-pot and having each its lower end opening into the curved flue and its top end opening into the adjacent side of the combustion chant her, and means for regulating the said valve.

2. In a heatlng apparatus of the class described, a fire-pot with a gas and air mlxlng chamber near above it, an air duct surround- I ing the mixing chamber and having apertures letting air in laterally from severai'f framework with a firepot in it and below the fire-pot an ash chamber having a comparatively large door, horizontal cleats secured to the inner sides of the ash chamber and having circularly arranged studs at their upper sides, a grate Supporting ring resting upon the cleats and being rotatable between the studs, horizontal grate bars journaled in the upper side of the ring and geared together to rotate in unison, and means for rotating the ring in a horizontal plane and the grates in a vertical plane, said ring being remov able forwardly by lifting it above the studs, and the door being large enough for removing and replacing the ring with the grate bars resting in the journals.

4. The structure specified in claim 2, said central duct-leading air downward into the chamber consisting of a downwardly tapering tube with an enlarged hollow and laterally perforated head detachably secured on its lower end. i

5. The structure specified in claim 2, said surrounding air duct having the portion of it adjacent the door flared out to the same size as the door opening.

6. The structure specified in claim 1, and a spaced jacket encircling the said structure and having inlet for air to be heated and outlet for the heated air into the space to be heated.

In testimony whereof I affix my signature.

FRED W'EINECK. 

